Rancho Bolsa de San Cayetano was a 8,896-acre (36.00 km2) Mexican land grant in present day Monterey County, California given in 1824 by Governor Luís Antonio Argüello to Ygnacio Ferrer Vallejo, and confirmed to his eldest son, José de Jesús Vallejo, by Governor José Figueroa in 1834. The name means "pocket of St. Cayetano". Pocket usually refers to land surrounded by slough - in this case the Elkhorn Slough. The grant was bordered on the west by Monterey Bay and on the north by the Pajaro River, and is just south of present day Watsonville.